Pinnacle Airlines President Phil Trenary addresses hundreds of employees, downtown supporters and officials during a celebration commemorating his company's move to its new headquarters at One Commerce Square on Oct. 8, 2010. File/The Commercial Appeal

March 15, 2011 - Pinnacle Airlines President and CEO Phil Trenary reflects on his 14 years with Pinnacle during an interview Tuesday afternoon about his decision to step down as head of the Memphis based airline. File photo/The Commercial Appeal

March 15, 2011 - Pinnacle Airlines President and CEO Phil Trenary reflects on his 14 years with Pinnacle during an interview Tuesday afternoon about his decision to step down as head of the Memphis based airline. File photo/The Commercial Appeal

March 15, 2011 - Pinnacle Airlines President and CEO Phil Trenary reflects on his 14 years with Pinnacle during an interview Tuesday afternoon about his decision to step down as head of the Memphis based airline. File photo/The Commercial Appeal

March 15, 2011 - Pinnacle Airlines President and CEO Phil Trenary reflects on his 14 years with Pinnacle during an interview Tuesday afternoon about his decision to step down as head of the Memphis based airline. File photo/The Commercial Appeal

October 27, 2015 - Phil Trenary (center), President and CEO, Greater Memphis Chamber, listens to David Porter, President and Founder, Consortium Memphis Music Town, as he leads a tour of the Consortium's Talent Development Complex at 119 S. Main St. Tuesday. "The future of this city lives in its young," David Porter said. "I'm so proud of the young people of this city." (Yalonda M. James/The Commercial Appeal) File photo/The Commercial Appeal

November 19, 2014 - Phil Trenary (left) and Carolyn Hardy were among those who spoke to the Shelby County Commission during an economic development session at a retreat held at the University of Memphis Fogelman Executive Center. (Mike Brown/The Commercial Appeal) File photo/The Commercial Appeal

October 27, 2015 - (From left to right) - Diane Rudner, Chairman of the Board of Trustees, Plough Foundation, David Porter, Founder and President, Consortium Memphis Music Town, Mike Bruns, Founder and former president of Comtrak, Phil Trenary, President and CEO, Greater Memphis Chamber, and George Monger, Vice President and Executive Director, Consortium Memphis Music Town, have a ribbon cutting ceremony during the opening of the Consortium's Talent Development Complex at 119 S. Main St. Tuesday. (Yalonda M. James/The Commercial Appeal) File photo/The Commercial Appeal

Memphis Chamber of Commerce President and CEO Phil Trenary (left) jokes with Ikea's Real Estate Manager Reed Lyons and Expansion Public Affairs Manager Joseph Roth (right) after a press conference in December 2014 in the Hall of Mayors to announce that a new Ikea store is planned for the Wolfchase area. File photo/The Commercial Appeal

Northwest Airlink president Phil Trenary deplanes the Spirit of Memphis in this 1998 file photo just prior to take-off Wednesday as his airline gets back up and running following Northwest Airlines strike. File photo/The Commercial Appeal

According to an affidavit, the trio "discussed possible robbery targets as they drove around downtown Memphis."

Richardson was charged Saturday following a police chase involving a vehicle that matched the description of one used in the homicide, but police had not said if the case was connected.

McKinney Wright Jr.(Photo11: Memphis Police)

Richardson was booked into the jail around 4 a.m. Saturday. Jail records show McKinney Wright Jr. was booked just before 10:30 p.m. the same day. The third suspect, as a minor, would not be housed in the same jail. Police did not say where Racanisha Wright was located but confirmed she is in custody.

The department announced the arrests on Twitter late Saturday night.

"This is another great example of the good work the men and women of MPD do every single day," Mayor Jim Strickland tweeted Sunday morning. "I'm grateful for their diligence and continued efforts to bring everyone involved in this case to justice."

'Citizens attempting to render aid'

The affidavit in the homicide case provides the first detailed description of the events of Thursday evening, illustrating an alleged plot to find a robbery target and bystanders' efforts to help Trenary, CEO of the Greater Memphis Chamber, following the shooting.

According to the affidavit, officers from the department's North Main Station were called to the 500 block of South Front Street at 7:28 p.m. for a report of a man who had been shot.

Trenary was lying in the street unresponsive, "with citizens attempting to render aid," according to the document.

"Witnesses on the scene advised they saw an individual exit the passenger side of a white truck and approach Philip Trenary from behind and shoot him," the affidavit said.

He was transported to Regional One Hospital in critical condition and was pronounced deceased at 7:58 p.m.

'Possible robbery targets'

The affidavit does not indicate how police connected the three people accused of the crime to the case, only that Richardson was identified as a suspect and located following the police chase Friday. Richardson provided a statement that led police to the other two suspects, according to the affidavit.

Police did not indicate if the other two suspects, who have the same last name, are related.

Statements from McKinney Wright Jr. and Racanisha Wright reportedly both said the trio "discussed possible robbery targets as they drove around downtown Memphis," according to the affidavit.

Quandarius Richardson(Photo11: Memphis Police)

Earlier Saturday, Memphis police announced Richardson was charged with theft of property with a value between $10,000 and $60,000, auto theft, reckless driving, reckless endangerment, driving without a license and evading arrest. An affidavit focused only on those charges said Richardson admitted to stealing the truck used in the police chase.

Another teen, Shymontre Reed, 19, was charged in connection with the police chase. Reed faces charges of theft of property with a value between $10,000 and $60,000, evading arrest and a probation violation, according to jail records, but has not been tied to the homicide.

Different description given of shooter

Before announcing the charges, police had not released a possible motive in the shooting or named any suspects. Police originally described the shooter as having dreadlocks, although the two adult suspects do not appear to have dreadlocks in their mug shots.

McKinney has one previous criminal case in Shelby County. He was arrested in February 2017 for felony drug possession after police reportedly found bags of ecstasy inside a house where McKinney was living. He was indicted in that case in May but had been out on a $15,000 bond, according to court records.

Richardson does not have any previous charges listed in the Shelby County Criminal Justice System online portal.

Both are due in court on Monday for a video arraignment at 9 a.m.

Killed following chamber event

Trenary was killed Thursday night after an event at Loflin Yard hosted by the chamber. He was previously the CEO of Pinnacle Airlines. He was 64 years old, a father, grandfather and a fierce advocate for his adopted city.

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Memphis first responders work the scene where a police chase lead to a series of accidents near the intersection of Mississippi Blvd and East McLemore Avenue on Friday, Sept. 28, 2018. Joe Rondone/The Commercial Appeal,

Memphis first responders work the scene where a police chase lead to a series of accidents near the intersection of Mississippi Blvd and East McLemore Avenue on Friday, Sept. 28, 2018. Joe Rondone/The Commercial Appeal,

Memphis first responders work the scene where a police chase lead to a series of accidents near the intersection of Mississippi Blvd and East McLemore Avenue on Friday, Sept. 28, 2018. Joe Rondone/The Commercial Appeal,

Memphis first responders work the scene where a police chase lead to a series of accidents near the intersection of Mississippi Blvd and East McLemore Avenue on Friday, Sept. 28, 2018. Joe Rondone/The Commercial Appeal,

Memphis first responders work the scene where a police chase lead to a series of accidents near the intersection of Mississippi Blvd and East McLemore Avenue on Friday, Sept. 28, 2018. Joe Rondone/The Commercial Appeal,

Memphis first responders work the scene where a police chase lead to a series of accidents near the intersection of Mississippi Blvd and East McLemore Avenue on Friday, Sept. 28, 2018. Joe Rondone/The Commercial Appeal,

Memphis first responders work the scene where a police chase lead to a series of accidents near the intersection of Mississippi Blvd and East McLemore Avenue on Friday, Sept. 28, 2018. Joe Rondone/The Commercial Appeal,

Memphis first responders work the scene where a police chase lead to a series of accidents near the intersection of Mississippi Blvd and East McLemore Avenue on Friday, Sept. 28, 2018. Joe Rondone/The Commercial Appeal,

Memphis first responders work the scene where a police chase lead to a series of accidents near the intersection of Mississippi Blvd and East McLemore Avenue on Friday, Sept. 28, 2018. Joe Rondone/The Commercial Appeal,

Memphis first responders work the scene where a police chase lead to a series of accidents near the intersection of Mississippi Blvd and East McLemore Avenue on Friday, Sept. 28, 2018. Joe Rondone/The Commercial Appeal,

Leftover police tape lays along the sidewalk of South Front Street where Phil Trenary, head of the Greater Memphis Chamber, was killed in a shooting on Thursday night. Joe Rondone/The Commercial Appeal

Mark Guyton, who has known Phil Trenary for years, visits the downtown location on South Front Street Friday morning where Trenary was killed in a shooting on Thursday night. Joe Rondone/The Commercial Appeal,

The chamber held a 4-mile run, starting at 6:30 p.m. and ending at Loflin Yard.

Trenary didn't run the race, according to race records and a witness who saw him walking around the outdoor bar in a suit. It's unclear what time he left the bar, but he was shot less than half a mile away.

Trenary's funeral is set for Thursday. Visitation will start at noon with a service at 2 p.m. in the Seabrook Hall at Christ United Methodist Church, 4488 Poplar Avenue.